Upgrade key dependencies and GitHub Actions workflows

[Yerzhaisang]

Description

• GitHub Actions Workflow Updates:
  • Upgraded setup-python to v5
  • Updated backport to v2.2.0
  • Upgraded codecov-action to v5
  • Updated create-pull-request to v7
  • Upgraded get-pr-commits to v1.3.1
• Dependencies: (in progress)
  • Upgraded mypy to the latest version for enhanced static type analysis.
  • Updated sphinx to improve documentation generation.
  • Upgraded sphinx-rtd-theme for better compatibility with the latest sphinx releases.

Check List

• All tests pass
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.87%. Comparing base (529ee34) to head (bc6104b).
Report is 17 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #437      +/-   ##
==========================================
- Coverage   91.53%   90.87%   -0.67%     
==========================================
  Files          42       43       +1     
  Lines        4395     4602     +207     
==========================================
+ Hits         4023     4182     +159     
- Misses        372      420      +48     

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